Merry Christmas

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Across
  1. 4. When a liquid changes into a gas at its boiling point
  2. 6. The start of a fire
  3. 7. The force of gravity on an object
  4. 8. The force that resists motion between surfaces
  5. 14. To change position
  6. 15. Having a large weight
  7. 17. The amount of matter in an object
  8. 19. Matter that spreads out to fill its container, like air in a balloon
  9. 20. A force that moves things closer, like reindeer pulling a sleigh
  10. 24. When all motion ends
  11. 26. The organs that take in oxygen
  12. 28. Moving with high speed
  13. 29. The organ that controls our body
  14. 30. A container used for measuring liquids
  15. 31. Surface that creates less friction
  16. 35. The gas we need for respiration
  17. 37. The measure of an object's dimensions
  18. 39. Jelly-like substance inside cells
  19. 40. Moving with low speed
  20. 41. Motion when friction is low
  21. 42. Water in its gas form, visible above hot drinks
  22. 43. The hot, glowing part of a fire in the fireplace
  23. 46. The rate of movement
  24. 47. The control center inside every cell
  25. 50. A form of energy that warms hot chocolate
  26. 51. The form of an object
  27. 52. A transparent, brittle material
  28. 55. When a liquid changes into a solid as temperature drops
  29. 57. The red liquid that transports substances around the body
  30. 58. A liquid that freezes to make snow
  31. 61. The unit we use to measure length
  32. 62. Matter that flows and takes the shape of its container
  33. 63. Having a low temperature
  34. 64. The basic building block of all living things
  35. 66. The barrier that controls what enters and leaves a cell
  36. 68. The most important rule in any science lab, even at the North Pole
  37. 69. The mixture of gases around us
Down
  1. 1. The organ that pumps blood
  2. 2. Hard tissue that makes up our skeleton
  3. 3. TUBE A long glass tube for small experiments
  4. 5. Having a small weight
  5. 9. Surface that creates more friction
  6. 10. Material from tree trunks and branches
  7. 11. To move upward
  8. 12. When a solid changes into a liquid as temperature rises
  9. 13. To move downward
  10. 16. When upward forces balance an object's weight in fluid
  11. 18. Metal that can store elastic potential energy
  12. 19. Protective equipment for your eyes in the lab
  13. 21. When an object's weight is greater than upward forces
  14. 22. The force that brings snowflakes down to Earth
  15. 23. To increase in length
  16. 25. The force spread over an area, like feet in deep snow
  17. 27. TAP Controls the gas flow to Bunsen burners
  18. 29. A gas burner used as a heat source in labs
  19. 32. A body part made of different tissues working together
  20. 33. Having a high temperature
  21. 34. Water in its solid state
  22. 36. A push or pull on an object, like Santa's sleigh needs to move
  23. 38. A measure of duration
  24. 42. To decrease in size under pressure
  25. 44. A force that moves things away
  26. 45. A group of similar cells working together
  27. 48. Where matter exists
  28. 49. Elements that conduct heat and electricity well
  29. 53. Matter that keeps its shape, like ice
  30. 54. Tissue that contracts to create movement
  31. 55. Material that stores energy we can release
  32. 56. The ability to make things happen or change
  33. 59. A tool for measuring length accurately
  34. 60. A synthetic material that can be molded
  35. 62. Where scientists do experiments all year round
  36. 65. When no forces are causing motion
  37. 67. The unit we use to measure force